He said a senior officer told him: “I’m hearing your name mentioned in high places. You’re getting too good at this. I’m going to have to shut it down.”

DC Wedger said he was transferred to the Met’s clubs and vice unit but he says he was ordered not to bring underage girls into the station. He said: “If you brought a kid in your night was finished.”

He added: “I investigated a pimp known as Foxy who sold a 14-year-old girl called Zoe for sex and got her hooked on crack cocaine.

“One of Foxy’s clients was a magistrate who used to regularly let her off when she got pulled in by police. There was also someone from the music department of the BBC involved.”

PH

NO ATTEMPT: Ms Oliver claimed the evidence to nail grooming gangs was not being used

DC Wedger said he wrote a report exposing the case around 2010 but nothing was followed-up. Then a senior officer summoned him to his office. He went on: “It was like someone had set a pit bull on me. He told me he was taking me off and shutting it down.”

DC Wedger claims that later another senior officer told him: “What you have exposed is going to f*** us past, present and future.

“This cannot ever get out and if it does you will be thrown to the wolves. So shut your f***** mouth.”

DC Wedger is still employed by the Met but has no current role.

He claims the force has halved his wages and is trying to force him into early retirement.

He has the support of former Detective Constable Margaret Oliver who left Greater Manchester Police claiming the evidence of child sex ring victims was not being used to nail grooming gangs.

A Met spokesman said last night the force was aware of “various allegations” made by a detective constable which were being assessed by its Professional Standards Directorate.